ExampleCard number: 62E3086CED Checksum:( 62H)XOR(E3H)XOR(08H)XOR(6CH)XOR(EDH)=08H Note: The 10 ASCII characters grouped as 5 hex data needs to be further processed as you may find that the 5 hex data is not equal to the number marked on the tags in Decimal. Actually the tag number is equal to the later 4 bytes in decimal. For example, the card number is 62E3086CED, the corresponding number marked on the tag should be 60717296877 which is the Decimal format of E3086CED.